Update ZooKeeper to 3.4.6

- Updated ZooKeeper to current stable version. (ONOS-1347)
- There are some references in scripts under old-scripts,
  which has not been updated.

Change-Id: Iac96c46ee7e821bcc0e471a5c8cd8a3165a4b439
diff --git a/pom.xml b/pom.xml
index c4568fb..b2e8872 100644
--- a/pom.xml
+++ b/pom.xml
@@ -591,24 +591,8 @@
     <dependency>
       <groupId>org.apache.zookeeper</groupId>
       <artifactId>zookeeper</artifactId>
-      <version>3.4.5</version>
+      <version>3.4.6</version>
       <scope>runtime</scope>
-      <!--  Following workaround exclusions can be removed,
-            when we're ready to switch to ZooKeeper 3.4.6 -->
-      <exclusions>
-        <exclusion>
-          <groupId>com.sun.jmx</groupId>
-          <artifactId>jmxri</artifactId>
-        </exclusion>
-        <exclusion>
-          <groupId>com.sun.jdmk</groupId>
-          <artifactId>jmxtools</artifactId>
-        </exclusion>
-        <exclusion>
-          <groupId>javax.jms</groupId>
-          <artifactId>jms</artifactId>
-        </exclusion>
-      </exclusions>
     </dependency>
     <dependency>
       <groupId>org.apache.curator</groupId>